Sanitary trap.



F. RICHARDSON, SANITARY TRAP.

APPLIOATION FILED APB.1.1aoa.

Patented May 11, 1909a WITNESSES:

THE NcRRls PErERs co., wAsmNcrorv. u. r:4

' pering downward, the base of the casing benary plug.

PATENT FFTCE.

FRED RICHARDSON, OF CROYDON, ENGLAND.

SANITARY TRAP.

No. 921,460. Specification of Letters Patent. Patented Mey 1i, ieee.

Application led April 1, 1908. Serial No. 424,603.

To all 'whom 'it 'may concern:

sleeve on its outside being ground to have a Be it known that I, FREDRICHARDSON, a true conical shaped surface so as to engage subject of theKing of the United Kingdom of Great Britain and Ireland, and resident ofCroydon, Surrey, England, have invented a certain new and usefullmprovement in Sanitary Traps, of which the following is aspecification.

This invention relates to an improved trap for sanitary purposes inwhich a hollow frusto-conical removable sleeve forms the division orcentral wall of the trap and the dip for the water seal.

The object of this invention is to provide a construction .of trap ofthe self cleansing type, of such formation as to give direct access tothe waste pipe from the mouth of the trap, and to provide for readycleansing of the waste pipe, so that an unskilled person without the aidof implements can remove andreplace the said sleeve, and to provide inconjunction with the trap casing a self adjusting slip joint so as topermit of the sleeve being .removed and replaced as easily as an ordi-In the construction of the improved trap, I form the external casing inone piece entirely and without a division wall forming the seal betweenthe inlet and outlet sections. The interior of the casing is formed as aplane surface without shoulders, offsets, insets or obstructions of anykind, no lengthening pieces such as ferrules, caps, screw tubes orflanges forming the top or mouth of the trap being required, and thejointing of such ferrules, caps, screw tubes, or Yflanges inside thetrap beingavoided. rlhe interior of the casing is made with an enlargedmouth, ta-

ing made semicircular in formbothlongitudinally and transversely. Thetop of the outlet section is formed at right angles to the inlet forgiving access to the waste-pipe, and the outside of the casing at thetop from the waste-pipe connection upward is made vertical. If thecasing is required to be fixed to a vessel, the vertical part of thecasing is screw-threaded. The upper part of the inside of the casingwill be ground to have a true conical shaped surface, so as to form theseating for a slip joint formed on the removable sleeve and for a plugif required. To separate the inlet portion from the outlet portion ofthe casing, l lit a removable dip in the form of a hollow frusto-conicalsleeve in the true formed surface on the inside of the casing, and toform aself adjusting and watertight joint. The sleeve when placed in themouth of the casing forms in part'an inner lining adjacent to the trapcasing and in part a removable partition shutting off the waste pipefrom the mouth of the trap so that no filth or refuse can collect in thewell of the trap or out of the direct line of force of the waterflushes. The conical sleeve is also eX- tended downward below the waterline to form the dip or seal Two openings only are formed in the conicalsleeve the one having the largest diameter being at the top throughwhich the water enters the trap.

The trap casing and conical sleeve constructed as described form a trapof the self cleaning type having a full bore and unobstructed -way fordischarges to pass through the trap in an unbroken forni: the mouth ofthe trap is fixed direct to the vessel thus avoiding any length of inletpipe between the vessel and trap, and also insuring that the waterflushes shall pass downward through the conical sleeve and fall upon theupper surface of the water contained in the body of the trap on theinlet side with a vertical pressure acting as a plunger so as to driveeverything` therein contained out of the trap, and to change itsprevious contents entirely. The water way through the trap is notautomatically opened or closed, but remains constant, always allowingfree discharge to the outlet.

lt being a sanitary requirement that the contents of traps should bedischarged with each flush of water and that no accumulation of refuseshould be allowed to collect, it is necessary that the well of the trapshould be formed so as to contain as small a quantity of-water aspossible, consistent with a proper seal, and that the form of the trapshould be of a sha e approximate to a bent pipe having an en argedmouth. lt will be seen that a tra of this shape is more fully cleansedby eac i flush of water than a trap so shaped that the water passesthrough a cylindrical tube which has a smaller diameter than the body ofthe trap, and wherein the water flush discharges into the middle of thatcontained in the trap, forcing some of the contents in an oppositedirection to the outlet of the trap and never entirely changthe body ofthe trap; the upper part of this ing its previous contents.

For the purpose of giving convenient access to the waste pipe forcleaning, the conical sleeve is made 1n conjunction with the trap casingto have a slip joint which enables it to be removed and replaced aseasily as al ordinary plug.; the conical sleeve is thus madeself-seating and adjusting, and cleaning caps xed in the welloi' thetrap1 are not required.

The trap casing and conical sleeve may be made of any suitable metal,glass, vulcanifte, earthenware, stonewarey or the like. Vh-eny the trapis made ofl metal, glass or vulcanite; the jointingl of the conicalsleeve with the casing is: ground in; and when the trap is made ofstoneware or earthenware, the joint is' molded with bituminous asphaltor other suitable material. For the purpose oi fixing the trap to avessel', if required, I provide two fly nuits to be attached to thevertical screw-threaded part of the casing; one at the bottom of thevessel and one at the top, iitting into the-rab'bet of the orifice upona bed of. red lead or other suitable material; the bottom fly nut isscrewed upward so as to compress the botto-m of the vessel between thetwo and form a rigid iixi-ng of the trap.

If required, inlets for overiiows can be provided; such inlets may beplaced either in the neck of the easing above the conical sleeve, ombelow into the well of the trap. A plug and grating can be fitted andattached` if reqnired.

the accompanying drawing which illustratesntheinventiorr Figure l? is avertical section of theirnprovedJ trap. Fig. 2 is a vertical section ofthe improved trap,` drawn at right angles tol Fig.. l.. Fig. 3 is ahorizontal section oir. the line Q-R of Fig. 1, showing the hollowconical sleeve asa lining adjacent to they trap:r casing.

and IvI arefl'y nuts and: are adapted' to be attach-edI by ascrew-threaded joint toV the trap on itsY outside' for the purposeoffixing the trap to the vessel.

I is the tra casing.

J is the hol ow conical sleeve.

B2 is the outlet to the waste-pi e.

K and L are the grating and p ug.

I claim zl. The combination with a self cleansing sanitary trap casinghaving an opening on the top formin the mouth of the trap, and having alatera waste pipe connection, and presenting an unobstructed way for thepassage of water, of a removable dip-in the form of an open-ended hollowfrusto-conie'al sleeve formingv in conjunction with the casing a selfadjusting watertight slip joint, said' sleeve being extended downwardbelow the water-line to forni an eHective seal, a part of the outersurface of said sleeve being in con:- tact with the interior face of thecasing, and a part of the sleeve being clear of the casing and forming apartition dividing the well of the trap into two sections, and shuttingofi the waste-pipe connection from tlre mouth of the trap- 2. Thecombination with a sanitary trap casing; having an open top forming. themouth of the trap and having a lateralfoutlet connection, of a toprflange connected tothe outsideof the casing of the trap, a back nut forsecuring the trap in lace, a removable open-ended frusto-conica I sleeveforming in part an inner lining to the trap casing and in part anintern-al division between the inlet and outlet sections of the trap,the conical sleeve making a watertight joint. with the casing of thetrap and forming a water-seal7 and a removable plug for closing themouth of the trap, as described.

In testimonjT whereof I have signed my name to this specification in thepresence-of two subscribing witnesses.

FRED RICHARDSON.

Witnesses ALFRED THOMAS BURBERY, FRANK W. BURBERY.

